PID tuning

start calibration procedure in terminal 
 commande list: https://reprap.org/wiki/G-code#M304: Set_PID_parameters -_Bed 
 M303 S200 C10
 
 wait 
 M304 P11.72 I0.58 D59.63
M304 P12.24 I0.61 D61.06
 
 save params 
 M500